Toyota FZ engine

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Toyota FZ engine
Toyota 1FZ FE.jpg
Overview
Manufacturer Toyota
Production 1984–2007
Combustion chamber
Configuration I6
Displacement 4.5 L (4,477 cc)
Cylinder bore 100 mm (3.9 in)
Piston stroke 95 mm (3.7 in)
Valvetrain DOHC
Combustion
Fuel system
Output
Power output
  • 190 hp (140 kW) (1FZ-F)
  • 212 hp (158 kW) (1FZ-FE)
240 hp (180 kW) (FZJ100)
Torque output
  • 268 lb·ft (363 N·m) @ 2800 RPM (1FZ-F)
  • 275 lb·ft (373 N·m) @ 3200 RPM (1FZ-FE)
300 lb·ft (410 N·m) @ 3600 RPM (FZJ100)
Chronology
Predecessor Toyota F engine

The Toyota FZ engine was a 24-valve, 4.5L DOHC straight-6 internal combustion engine manufactured by Toyota to replace the F-series engine. It was used primarily in SUVs because of its large displacement, smoothness, ruggedness and torque.

Technical data[edit]

The engine displaced 4477 cc with a bore and stroke measuring 100 millimetres (3.9 in) x 95 millimetres (3.7 in), respectively and a 9.0:1 compression ratio; the head used Toyota's narrow-angle overhead camshafts for better fuel economy.[1] The 1FZ had only two variants available: the 1FZ-F and the 1FZ-FE. The only significant difference between the two was the inclusion of electronic fuel injection on the 1FZ-FE, whereas the 1FZ-F used a carburetor.[2]

The 1FZ-F produced 190 horsepower (140 kW) at 4400 RPM and 268 pound-feet (363 N·m) at 2800 RPM; its fuel injected counterpart produced 212 horsepower (158 kW) at 4600 RPM and 275 pound-feet (373 N·m) at 3200 RPM.

Starting in 1998, the fuel injected version of the 1FZ-FE was also manufactured with a direct ignition variation available in certain non-US markets (the engine pictured here is that variant discernible by the intake manifold and lack of distributor). This version of the engine received many updates over the previous version such as a redesigned head, more compact pistons, updated throttle body, an improved intake manifold with longer intake runners, 4 nozzle fuel injectors to improve fuel atomization and direct ignition. This version of the 1FZ-FE produced 240 horsepower (180 kW) at 4600 RPM and 300 pound-feet (410 N·m) at 3600 RPM on 91 Octane Fuel (RON) without a catalytic converter.

Usage[edit]

The 1FZ-F and -FE were used in the following vehicles:

See also[edit]

List of Toyota engines

References[edit]